Performing preventive maintenance
..................................................................................................
128
ADF maintenance kit
........................................................................................................
128
Calibrate the scanner
........................................................................................................................
129
Set the real-time clock
.......................................................................................................................
130
Set the date format
...........................................................................................................
130
Set the date
.......................................................................................................................
130
Set the time format
............................................................................................................
130
Set the time
.......................................................................................................................
130
4
Theory of operation
Basic operation
..................................................................................................................................
134
Operation sequence
.........................................................................................................
135
Operation sequence (scanner)
.........................................................................................
135
Power on sequence
..........................................................................................................
136
Formatter system
...............................................................................................................................
138
Sleep mode
.......................................................................................................................
138
Image Resolution Enhancement technology (REt)
..........................................................
139
Input/Output
......................................................................................................................
139
Parallel interface
..............................................................................................
139
USB 2.0 connector
...........................................................................................
139
ACC accessory port
.........................................................................................
139
Flash
.................................................................................................................
140
Hard disk
..........................................................................................................
140
CPU
..................................................................................................................
140
FIH (foreign interface harness)
........................................................................
140
MFP memory
....................................................................................................................
140
Read-only memory
...........................................................................................
140
Random-access memory
.................................................................................
140
DIMM slots
........................................................................................................................
140
Flash memory
..................................................................................................
140
Nonvolatile memory
.........................................................................................
141
PJL overview
.....................................................................................................................
141
PML
...................................................................................................................................
141
Control panel
.....................................................................................................................
141
Scanner interface
..............................................................................................................
141
Engine control system
.......................................................................................................................
142
DC controller PCB
.............................................................................................................
142
Block operation
................................................................................................
144
Motors, fans, and environment sensor
.............................................................................
144
Failure detection
...............................................................................................................
147
Drum motor failure detection
............................................................................
147
Fuser motor failure detection
...........................................................................
147
ETB motor failure detection
.............................................................................
147
Rear exhaust fan failure detection
...................................................................
147
Cartridge fan failure detection
..........................................................................
147
Delivery fan failure detection
............................................................................
147
Power supply fan failure detection
...................................................................
148
Scanner fan failure detection
...........................................................................
148
ADF fan failure detection
.................................................................................
148
Control fans #1 and #2 failure detection
..........................................................
148
ENWW
vii